gassinger



(No Model.) 2 Sheets-Sheet 14 A. GASSINGER & A. GASSINGER, Jr. MANYSPINDLB LATHE.

No. 332,509. Patented Dec. 15, 1885.

/ k /I/IIII/I/IIA a -Inventor (No Model.) I 2 Sheets-Sheet 2. A.GASSINGER 8a A. GASSINGER, Jr

. MANY SPINDLE LATHE. No. 332,509. Patented Dec. 15, 1885.

u. PETERS, Phckr rlnhagnphcr. Washington. a c.

Fries.

AUGUST GASSINGER AND AUGUST GASSINGER, JR, OF BALTIMORE, MD.

MANY-SPINDLE LATHE.

SPECIFICATION forming part of Letters Patent No. 332,509, dated December15, 1885.

(N'o model.)

To all whom it may concern.-

.Be it known that we, Aueusr GASSINGER and AUGUST GASSINGER, J r.,subjects of the Emperor of Germany, residing; at Baltimore city andState of Maryland, have invented certain new and useful Improvements inMany- Spindle Lathes; and we do hereby declare the following to be afull, clear, and exact description ofthe invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to that type of manyspindle lathes which areadapted for turning polygonal forms.

The objects of our invention are to construct such a lathe that circularas well as polygonal forms may be turned on it, and that the blanks canbe centered and the finished articles re moved one after another.

To these ends our invention consists of certain novel combinations, setout specifically in the claims at the close of this specification.

In order that our invention may be clearly understood, we haveillustrated in the annexed drawings and will proceed to describe a formthereof which we have used successfully in practice.

Figure 1 represents a perspective view 0 our many-spindle lathe. Fig. 2represents a plan of the same. Fig. 3 represents a face view of the diskwhich carries the tail-chucks and set-gearing. Fig. 4 represents anaxial section of said disk and adjuncts.

The same letters of reference indicate iden tical parts in all thefigures.

The bed, shears, headstock and live-spin dle, tail-stock anddeadspindle, and tool-rest of the lathe illustrated in the annexeddrawings are constructed and associated after the ordinary manner, thelive-spindle carrying a set of band pulleys or sheaves, l and 2, forinstance, so that it may be driven at different rates of speed fromreverse sheaves 3 and 4 on the counter-shaft 5.

The work is carried on a reel composed of a mandrel, A, a head formed oftwo disks, B and B, and carrying a concentric series of six equidistanthead chucks, B", and a taildisk, 0, carrying a concentric series of sixtail-chucks, O, in alignment with the headchucks. The reel is mountedand centered by its mandrel A on the live-spiudie and deadspindle of thelathe, and fastened to the livespindle by a suitable coupling, A. Thehead of the reel is permanently fixed to the mandrel A; but thetail-disk is connected to the mandrel by feather and groove, so that itmay be slid thereon to regulate the distance between the head-chucks andtail-chucks to any length of blanks within the capacity of the lathe.The mandrel is screw-threaded for the greater part of its length andcarries two nuts, 0 and a, and a spiral spring, a", by which nut-s andspring the taildisk O is held in position on the mandrel, the springbeing located between the nut a and the face of the tail-diskconfronting the head of the reel, while the nut a is screwed up againstthe elongated hub 0 on the other face of the tail-disk. It will beobserved that the spring facilitates the adjustment of the tail-disk inelongating the reel, and does not interfere with its adjustment inshortening the reel, and that either adjustment can be effected within aconsiderable range by adjustment of nut a alone. Each head-chuck B has acentering-point, b, and two shorter eccentric driving-spurs, b and b,and each has an axle, b, journaled in the disks B and B, and carryingbetween said disks a small sheave, If. T he sheaves b" may be driven bya band from a large sheave, G, on countershaft 5. Each tail-chuck has anelongated tubular hub, c, by which it is journaled in the tail-disk, andwhich is internally screw-threaded for the reception of a serewthreadedcentering-pin, 0 This centering'pin O is provided with a handle, so thatit can be conveniently retracted and projected. Each tail chuck isalsoprovided with two eccentric driving-spurs, c and 0 On the hub c of eachtail-chuck is fixed a spur-pinion, G and these pinions, all of the samesize, are adapted to be engaged by a spur-Wheel, D, mounted on the hub cof the tail-disk, and, say, twice aslarge as the pinions, so that ahalf-turn of wheel D will impart a full turn to each pinion. Spur-wheelD may be slid on hub c to throw it in gear or out of gear. When in gearwith pinion O, and fastened by set-screw d, so as to turn with thetail-disk, it will hold all the pinions 0 locked, and prevent rotationof the tail-ch ucks on the tail-disk. Vhen spur-wheel D is thrown out ofgear, the tail-chucks may freely rotate on the tail-disk.

The spur-wheel D is used in turning polygonal forms, both for thepurpose of preventing the rotation of the chucks in forming any one sideof the blanks, and for accurately setting the blanks for formingsuccessive sides thereof. To the latter end a portion of the outer orexposed face of spur-wheel D has a scale,the divisions of whichrepresent degrees on the pitch-line of pinions G and the tail-disk car.-ries a fixed pointer, D. By these means the operator can accurately setthe blanks each time a side has been formed by turning wheel D on hub 0until the pinions C have been advanced the required number of degrees.

In addition to set-screw d, or in lieu of it,- wheel D may be clamped tothe tail disk by a clamping-bolt, -d, a sectoral slot, (2 of suitablelength being cut through the wheel to permit all required circularadjustments.

When the lathe is to be used for turning polygonal forms, the band isthrown off sheave 6, and the reel may be rotated at the higher rate ofspeed given by sheaves 4 and 2. \Vhen the lathe is to be used, on theother hand, for turning circular forms,spur-wheel D is thrown out ofgear, the band placed on sheave 6, to drive sheaves bflso as to rotatethe chucks and blanks at a high rate of speed on the reel,and the reelis preferably driven at the lower rate of speed given by sheaves 3 and1.

I11 mounting the blanks the tail disk is moved back just far enough tolet the blanks enter clear of the driving-spurs of the chucks, so thatthe blanks may first be properly centered on the fixed centering-pointsb of the headchucks,and the adjustable centering-pins O of thetail-chucks, after which the tail-disk is moved up to force thedriving-spurs of the chucks into the blanks.

To remove the finished articles from the lathe, the tail-disk should bemoved back far enough to release the articles from the driving-spurs ofthe chucks, after which the articles may be removed one after another bysuccessively retracting the adjustable centering-pins.

We have illustrated our invention as embodied in a hand-lathe; but it isobvious that it may be used on and we do intend to apply it to latheshaving an automatic feed.

WVe claim as our invention- 1. In a many-spindle lathe of the characterdescribed, the combination, substantially as before set forth,of theree1,the series of headchucks, the axle of each of which carries a fixedsheave, the corresponding series of tailchucks, each of which carries afixed spurpinion, the mandrel of the reel, and the both circularly andlaterally shiftable spur-wheel on the said mandrel, which combinationprovides for turning either circular or polygonal forms on such lathe.

' 2. In a many-spindle lathe of the character described, thecombination, substantially as before set forth, of the reel, the fixedhead carrying the head-chucks of the reel,the mandrel of the reel, thelaterally-shiftable tail-disk carrying the tail-chucks, and the nuts andspring adjustable centering-pin, the mandrel of they reel, and theshiftable tail-disk carrying said tail-chucks.

In testimony whereof We affix our signatures in presence of twowitnesses.

AUGUST GASSINGER.

AUGUST GAESINGER, JR.

- W'itnesses:

FRANZ SOHANDELLE, J OHN G. ROLL.

